Four people are facing drug trafficking charges after investigators say they seized cocaine and marijuana brought in from Mexico, and agents found $142,000 in carry-on bags at Greenville-Spartanburg Airport.

In October 2011, Greenville police arrested Tony Carnell Wakefield and seized five kilograms of cocaine and 53 pounds of marijuana in a joint investigation with the Greenville County Sheriff's Office and the DEA.

During the course of the investigation, agents said they were able to identify the head of the organization in Greenville as James Snowden. Investigators said Snowden employed couriers to transport large amounts of U.S. currency to his drug sources in San Diego, Calif., using commercial airlines.

According to police incident reports, some of the drugs were shipped into the Mauldin FedEx Service Center where they were detected.

In February 2012, the DEA seized $142,000 after Transportation Security Administration agents at the Greenville-Spartanburg International Airport found the money in the carry-on bags of Davis and Maddox, who investigators say are members of Snowden's organization. Davis and Maddox were attempting to board a flight to San Diego, Calif.

On November 27, 2012, Snowden was arrested on federal drug charges in Greenville after being indicted by a grand jury in California.

Davis, Maddox, Glenn and Wakefield are charged with trafficking in cocaine and transporting monetary instruments derived from unlawful drug activity. They were being held with bond set at $70,000 each.